2019 Grand Prix, Riga

I added the crosstable and PGN for the second event in the 2019 Grand Prix. The tournament's logo is shown to the left. For the blog post on the first event, see 2019 Grand Prix, Moscow.

Three of the 15 matches played at Riga were decided by Armageddon games. Compare that to the Moscow event, where only one match went beyond the rapidplay tiebreak and was decided in the first blitz match.

Zonal Qualifiers C09-C12

At the end of the previous post, Zonal Qualifiers C11, I concluded,

I've decided that the format of the data in the chart is sufficient for new zonal pages on my World Championship site.

I applied the format to four cycles and created four new pages:-

• C09: 1972-75
• C10: 1975-78
• C11: 1978-81
• C12: 1981-84

These pages show only the qualifier data. The other bells and whistles found on the existing pages, like (C13) 1984-1987 Zonal Cycle Qualifiers, will be added after I create similar pages for C01 through C08.

Zonal Qualifiers C11

Last month, in Zonal Qualifiers C12, I developed a technique of documenting the qualification paths for the early World Championship cycles. The following chart shows that technique applied to the preceding cycle.

The first two columns are from the ZQP (zonal qualifying paths) data that I described in the C12 post. The last two columns are from my own pages. The zone numbers 'z01' etc. correspond to my page (C11) 1978-1981 Zonal Cycle. The last column is a code for the two interzonals that were held during the cycle:-

• 1979 Riga Interzonal; IX-X, 1979
• 1979 Rio de Janeiro Interzonal; --, 1979

There are two gaps in the data. One is for Mecking; the other is for Sunye Neto. I'll follow those up another time.

I've decided that the format of the data in the chart is sufficient for new zonal pages on my World Championship site. See the table at the bottom of the index page, World Chess Championship Zonals, for cycles C13 (1984-87) and after.